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feat(spec): Impl the ManifestFile read functionality (#69)
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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| use crate::spec::DataFileMeta; | ||
| use serde::Deserialize; | ||
| use serde_repr::{Deserialize_repr, Serialize_repr}; | ||
| use serde_with::serde_derive::Serialize; | ||
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| /// The same {@link Identifier} indicates that the {@link ManifestEntry} refers to the same data file. | ||
| /// | ||
| /// Impl Reference: <https://github.com/apache/paimon/blob/release-0.8.2/paimon-core/src/main/java/org/apache/paimon/manifest/FileEntry.java#L58> | ||
| #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)] | ||
| pub struct Identifier { | ||
| pub partition: Vec<u8>, | ||
| pub bucket: i32, | ||
| pub level: i32, | ||
| pub file_name: String, | ||
| } | ||
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| /// Kind of a file. | ||
| /// Impl Reference: <https://github.com/apache/paimon/blob/release-0.8.2/paimon-core/src/main/java/org/apache/paimon/manifest/FileKind.java> | ||
| #[derive(PartialEq, Eq, Debug, Clone, Serialize_repr, Deserialize_repr)] | ||
| #[repr(u8)] | ||
| pub enum FileKind { | ||
| Add = 0, | ||
| Delete = 1, | ||
| } | ||
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| /// Entry of a manifest file, representing an addition / deletion of a data file. | ||
| /// Impl Reference: <https://github.com/apache/paimon/blob/release-0.8.2/paimon-core/src/main/java/org/apache/paimon/manifest/ManifestEntry.java> | ||
| #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)] | ||
| pub struct ManifestEntry { | ||
| #[serde(rename = "_KIND")] | ||
| kind: FileKind, | ||
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| #[serde(rename = "_PARTITION", with = "serde_bytes")] | ||
| partition: Vec<u8>, | ||
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| #[serde(rename = "_BUCKET")] | ||
| bucket: i32, | ||
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| #[serde(rename = "_TOTAL_BUCKETS")] | ||
| total_buckets: i32, | ||
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| #[serde(rename = "_FILE")] | ||
| file: DataFileMeta, | ||
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| #[serde(rename = "_VERSION")] | ||
| version: i32, | ||
| } | ||
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| #[allow(dead_code)] | ||
| impl ManifestEntry { | ||
| fn kind(&self) -> &FileKind { | ||
| &self.kind | ||
| } | ||
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| fn partition(&self) -> &Vec<u8> { | ||
| &self.partition | ||
| } | ||
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| fn bucket(&self) -> i32 { | ||
| self.bucket | ||
| } | ||
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| fn level(&self) -> i32 { | ||
| self.file.level | ||
| } | ||
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| fn file_name(&self) -> &str { | ||
| &self.file.file_name | ||
| } | ||
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| fn min_key(&self) -> &Vec<u8> { | ||
| &self.file.min_key | ||
| } | ||
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| fn max_key(&self) -> &Vec<u8> { | ||
| &self.file.max_key | ||
| } | ||
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| fn identifier(&self) -> Identifier { | ||
| Identifier { | ||
| partition: self.partition.clone(), | ||
| bucket: self.bucket, | ||
| level: self.file.level, | ||
| file_name: self.file.file_name.clone(), | ||
| } | ||
| } | ||
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| pub fn total_buckets(&self) -> i32 { | ||
| self.total_buckets | ||
| } | ||
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| pub fn file(&self) -> &DataFileMeta { | ||
| &self.file | ||
| } | ||
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| pub fn new( | ||
| kind: FileKind, | ||
| partition: Vec<u8>, | ||
| bucket: i32, | ||
| total_buckets: i32, | ||
| file: DataFileMeta, | ||
| version: i32, | ||
| ) -> Self { | ||
| ManifestEntry { | ||
| kind, | ||
| partition, | ||
| bucket, | ||
| total_buckets, | ||
| file, | ||
| version, | ||
| } | ||
| } | ||
| } |
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